3. He's a co-founder of the National Center for Missing and Exploited Children

Before Adam Walsh's kidnapping and death, there was no national database on missing children. Law enforcement officers could enter information on stolen cars, stolen guns and stolen jewelry -- but there was no central place to keep information on missing children.

Carlina White, now 27, knew something was amiss when the woman who claimed to be her mother didn't resemble her and couldn't provide her birth certificate. So she logged onto the National Center for Missing and Exploited Children and found what turned out to be her baby picture -- eventually solving her own kidnapping.